Disable link doctor when in off the record/incognito mode.

chrome/browser/web_contents.cc

 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/web_contents.h"
 
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/file_version_info.h"
 #include "chrome/app/locales/locale_settings.h"
@@ skipping 1139 matching lines @@
 void WebContents::DidGetPrintedPagesCount(int cookie, int number_pages) {
   printing_.DidGetPrintedPagesCount(cookie, number_pages);
 }
 
 void WebContents::DidPrintPage(const ViewHostMsg_DidPrintPage_Params& params) {
   printing_.DidPrintPage(params);
 }
 
 GURL WebContents::GetAlternateErrorPageURL() const {
   GURL url;
+  // Disable alternate error pages when in OffTheRecord/Incognito mode.
+  if (profile()->IsOffTheRecord())
+    return url;
+
   PrefService* prefs = profile()->GetPrefs();
   DCHECK(prefs);
   if (prefs->GetBoolean(prefs::kAlternateErrorPagesEnabled)) {
     url = google_util::AppendGoogleLocaleParam(GURL(kLinkDoctorBaseURL));
     url = google_util::AppendGoogleTLDParam(url);
   }
   return url;
 }
 
 WebPreferences WebContents::GetWebkitPrefs() {
@@ skipping 571 matching lines @@
     // The favicon url isn't valid. This means there really isn't a favicon,
     // or the favicon url wasn't obtained before the load started. This assumes
     // the later.
     // TODO(sky): Need a way to set the favicon that doesn't involve generating
     // its url.
     new_url->SetFavIconURL(TemplateURL::GenerateFaviconURL(params.referrer));
   }
   new_url->set_safe_for_autoreplace(true);
   url_model->Add(new_url);
 }